In-beam γ-ray spectroscopy of the neutron-rich nitrogen isotopes<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">N</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>19</mml:mn><mml:mo>−</mml:mo><mml:mn>22</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Sohler, D.; Stănoiu, M.; Dombrádi, Zs.; Azaiez, F.; Brown, B. A.; Saint‐Laurent, M. G.; Sorlin, O.; Penionzhkevich, Yu. É.; Achouri, N. L.; Angélique, J. C.; Belléguic, M.; Borcea, C.; Bourgeois, C.; Daugas, J. M.; Oliveira-Santos, F. De; Dlouhý, Z.; Donzaud, C.; Duprat, J.; Elekes, Z.; Grévy, S.; Guillemaud‐Mueller, D.; Ibrahim, F.; Leenhardt, S.; Lewitowicz, M.; López-Jiménez, M. J.; Lukyanov, S. M.; Mittig, W.; Mrázek, J.; Negoiţă, F.; Podolyák, Zs.; Porquet, M. G.; Pougheon, F.; Roussel‐Chomaz, P.; Savajols, H.; Sletten, G.; Sobolev, Yu. G.; Stödel, C.; Tímár, J.

doi:10.1103/physrevc.77.044303

Cited by 46 publications

(53 citation statements)

References 25 publications

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“…Several halo nuclei were found near the neutron drip line and new candidates were suggested [2]. An example is 22 N, for which an enlarged spatial distribution of the 1s 1/2 neutron state was proposed [3] and might be supported by recent spectroscopic data [4].…”

Section: Introductionmentioning

confidence: 75%

One-neutron knockout from light neutron-rich nuclei at relativistic energies

Rodríguez–Tajes¹,

Álvarez‐Pol²,

Aumann³

et al. 2010

Phys. Rev. C

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One-neutron knockout reactions from neutron-rich nuclei, with Z = 6−13 and N = 8−22, were studied at the Fragment Separator (GSI) at high beam energies, around 700 MeV/nucleon. Structural phenomena such as the formation of one-neutron halos in odd-mass carbon isotopes ( 15,17,19 C) will be discussed. In addition, one-neutron knockout measurements from 22 N were carried out for the first time and demonstrate clearly the change from a 0d 5/2 to a 1s 1/2 orbital for the valence neutron, an effect that is expected above N = 14 and that was also observed in 23 O and 24 F. The possibility of an anomalous structure of 26 F, due to a significant 1s 1/2 neutron admixture, will also be discussed in the light of the experimental data obtained in this work. Finally, the ground-state configuration of neutron-rich neon isotopes ( 24−28 Ne) was studied, providing new information in a region that is relatively close to the island of inversion.

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Section: Introductionmentioning

confidence: 75%

One-neutron knockout from light neutron-rich nuclei at relativistic energies

Rodríguez–Tajes¹,

Álvarez‐Pol²,

Aumann³

et al. 2010

Phys. Rev. C

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“…The decay energy, E decay , corresponds to the excitation energy in 23 N above the neutron emission threshold. The invariant mass of the two-body system is obtained from the experimentally measured four-momenta of 22 N and the first time-ordered interaction in MoNA-LISA. To remove interactions from background γ-rays, a time-of-flight gate on prompt neutrons in coincidence with 22 N fragments was applied.…”

Section: Discussionmentioning

confidence: 99%

“…The invariant mass of the two-body system is obtained from the experimentally measured four-momenta of 22 N and the first time-ordered interaction in MoNA-LISA. To remove interactions from background γ-rays, a time-of-flight gate on prompt neutrons in coincidence with 22 N fragments was applied. The observed two-body decay energy for 23 N is shown in Fig.1, and displays two prominent peaks at E 1 ∼ 100 keV and E 2 ∼ 1 MeV.…”

Section: Discussionmentioning

confidence: 99%

“…Given that 22 N has two bound excited states [22], it is possible for the neutron decay to branch to multiple final states. To model this, the two-channel form of the Breit-Wigner was used with a common normalization:…”

Section: Discussionmentioning

confidence: 99%

“…The WBTM and WBM interactions contain a 12.5% and 25% reduction of the neutron-neutron interaction strength in the sd space. In the lighter nitrogen isotopes, a 12.5% reduction was necessary to reproduce the lowlying levels [22,27], while a 25% reduction was needed for the heavier carbon nuclei [22]. Proton excitations were limited to the p-shell, while neutron excitations were restricted to the sd-shell.…”

Section: Discussionmentioning

confidence: 99%

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Neutron-unbound excited states of N23

et al. 2017

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Neutron unbound states in23 N were populated via proton knockout from an 83.4 MeV/nucleon 24 O beam on a liquid deuterium target. The two-body decay energy displays two peaks at E1 ∼ 100 keV and E2 ∼ 1 MeV with respect to the neutron separation energy. The data are consistent with shell model calculations predicting resonances at excitation energies of ∼ 3.6 MeV and ∼ 4.5 MeV. The selectivity of the reaction implies that these states correspond to the first and second 3/2 − states. The energy of the first state is about 1.3 MeV lower than the first excited 2 + in 24 O. This decrease is largely due to coupling with the πp −1 3/2 hole along with a small reduction of the N = 16 shell gap in 23 N.

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